Riser stabilizer for sprinkler system pipes



FIG. 1 is a perspective view of a riser stabilizer for sprinkler system pipes showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side elevational view taken from the right of FIG. 1; and

FIG. 5 is a front elevation. 

The ornamental design for a riser stabilizer for sprinkler system pipes, substantially as shown and described. 